The Baroness Abercromby | |
| Succession: | suo jure Baroness Abercromby |
| Reign: | 1801–21 |
| Predecessor: | New Creation |
| Successor: | George Abercromby |
| Spouse: | Sir Ralph Abercromby |
| Issue: | Anne Abercromby Mary Abercromby Catherine Abercromby George Abercromby, 2nd Baron Abercromby Gen. Sir John Abercromby James Abercromby, 1st Baron Dunfermline Lt.-Col. Alexander Abercromby |
| Father: | John Menzies |
| Mother: | Ann Campbell |
| Birth Date: | Before 1752 |
Mary Anne Abercromby, 1st Baroness Abercromby (née Menzies; born ca. 1752 – 11 February 1821) was a Scottish peeress, socialite and the wife of General Ralph Abercromby.
Mary Anne was the daughter of John Menzies and Ann, daughter of Patrick Campbell. She was created suo jure 1st Baroness Abercromby, of Aboukir and of Tullibody, in the County of Clackmannanshire, by Letters Patent on 28 May 1801. The barony was awarded in recognition of her late husband's gallantry at the Battle of Alexandria, at which he was mortally wounded. On her death in 1821 she was succeeded in the barony by George, her eldest son.
She married Captain Ralph Abercromby (later Lt.-Gen. Sir Ralph Abercromby), son of George Abercromby and Mary Dundas, on 17 November 1767. They had children: